Please help me solve this question…. I have been sitting here and reading the textbook for a while…
[ Chemistry ] Open Question : I just need help with the mass of water that was lost during heating, question is below?
A student obtained the following data from a popcorn popping experiment in which only water was lost during heating. # of kernels used = 10 Mass of empty evaporating dish = 49.0792 g Mass of evaporating dish + kernels before heating = 50.7140 g Mass of evaporating dish + kernels after heating = 50.4802 g…
I know a concentration is the difference in concentration of a substance across a space gradient but what does it mean to move molecules with or against their concentrations gradient?
[ Chemistry ] Open Question : When a tire has 30 psi (pounds/inch^2), why doesn’t the tire weigh more?
It would make sense that even though the density of air at STP is very small, the unit is literally “pounds per square inch.” Why does a tire not weigh 30 pounds per square inch of volume?
Phosphorus -32 is a radioisotope used in leukemia therapy and it has a half-life of about 14 days. What percentage of phosphorus-32 will remain after a period of 6 weeks?